#356DAB
Closest named color: French Blue (#436BAD). oklch(52.7% 0.115 252.8), rgb(53, 109, 171).
Aa
White text reads best on this color (5.34:1).
About this color
#356DAB is a medium-dark, moderately saturated blue. In OKLCH its lightness is 53%, its chroma 0.115 and its hue 253°. Its hue sits on the cool side of the wheel. The nearest named color is French Blue (#436BAD), ΔE 0.014 away. White text reads best on it, at 5.34:1.
| Hue family | Blues |
| Lightness | medium-dark (53%) |
| Chroma | moderately saturated (0.115) |
| Temperature | cool |
| Nearest name | French Blue (#436BAD) |
| Black text | 3.92:1 |
| White text | 5.34:1 |
Values
| HEX | #356DAB |
| RGB | rgb(53, 109, 171) |
| HSL | hsl(212, 53%, 44%) |
| OKLCH | oklch(52.7% 0.115 252.8) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #356DAB | 5.34:1 | AA | Lc -81.7 | Fine for body text |
| Black text on #356DAB | 3.92:1 | AA large text | Lc 27.7 | Dividers and decoration only |
| #356DAB text on white | 5.34:1 | AA | Lc 76.4 | Fine for body text |
| #356DAB text on black | 3.92:1 | AA large text | Lc -25.4 | Dividers and decoration only |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 600.
-
Step 50
50
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E3EBF4
oklch(93.7% 0.015 251.2)
-
Step 200
200
#CCDBEC
oklch(88.5% 0.029 251.5)
-
Step 300
300
#AAC3E2
oklch(80.9% 0.052 253.9)
-
Step 400
400
#7CA4D3
oklch(70.7% 0.082 252.9)
-
Step 500
500
#598DC8
oklch(63.2% 0.106 252.6)
-
Step 600
600 (this color)
#356DAB
oklch(52.7% 0.115 252.8)
-
Step 700
700
#2F639B
oklch(49.2% 0.106 252.3)
-
Step 800
800
#28517E
oklch(42.8% 0.088 252.5)
-
Step 900
900
#254365
oklch(37.6% 0.069 252.8)
-
Step 950
950
#16273B
oklch(26.8% 0.044 253.3)
#356DAB with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #5171AE | 0.033 |
| Deuteranopia (no green cones) | #4066AA | 0.021 |
| Tritanopia (no blue cones) | #007B84 | 0.088 |
| Achromatopsia (no color) | #6B6B6B | 0.115 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #356DAB
#356DAB
oklch(52.7% 0.115 252.8)
- #925F00
#925F00
oklch(52.8% 0.113 72.9)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #356DAB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- French Blue #436BAD ΔE 0.014
- Mid Blue #276AB3 ΔE 0.020
- Flat Blue #3C73A8 ΔE 0.021
- Muted Blue #3B719F ΔE 0.025
- Nice Blue #107AB0 ΔE 0.038
- Ocean Blue #03719C ΔE 0.038
- Windows Blue #3778BF ΔE 0.040
- Dull Blue #49759C ΔE 0.043
Use #356DAB in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.